Sin A + 2 sin 2 A + sin 3A is equal to which of the following?1. \(4\sin 2{\rm{A}}{\cos ^2}\left( {\frac{{\rm{A}}}{2}} \right)\)2. \(2\sin 2{\rm{A\;}}{\left( {\sin \frac{{\rm{A}}}{2} + \cos \frac{{\rm{A}}}{2}} \right)^2}\)3. \(8\sin {\rm{A}}\cos {\rm{A}}{\cos ^2}\left( {\frac{{\rm{A}}}{2}} \right)\)Select the correct answer using the code given below:

Sin A + 2 sin 2 A + sin 3A is equal to which of the following?1. \(4\s

1.	Sin A + 2 sin 2 A + sin 3A is equal to which of the following?1. \(4\sin 2{\rm{A}}{\cos ^2}\left( {\frac{{\rm{A}}}{2}} \right)\)2. \(2\sin 2{\rm{A\;}}{\left( {\sin \frac{{\rm{A}}}{2} + \cos \frac{{\rm{A}}}{2}} \right)^2}\)3. \(8\sin {\rm{A}}\cos {\rm{A}}{\cos ^2}\left( {\frac{{\rm{A}}}{2}} \right)\)Select the correct answer using the code given below:
A.	1 and 2 only
B.	2 and 3 only
C.	1 and 3 only
D.	1, 2 and 3
Answer» D. 1, 2 and 3